I have some video blogs that I'd like to turn into CA animations. However, I don't want to have to rerecord them. Can I take the archived video footage and use it to create a CA animation, rather than using a live feed from a webcam?

Thanks for the tip about Manycam. I was just pointing a webcam at a screen and playing the video in a window (either on a separate monitor or a separate computer). It worked okay, but an all software solution is preferable.